The Oklahoma legislature has made several statutory changes that are intended to clarify and simplify the requirements for prelien notices. Delivery of a valid prelien notice is a condition precedent to the enforceability of a mechanic's or materialman's lien. The applicable statutes are codified in OKLA. STAT. tit. 42, §§ 141-154 (2011).
All of the previous requirements for special forms, service, and acknowledgment of notices of the possibility of a mechanic's or materialman's lien on property then occupied as a dwelling by the owner of the property have been repealed. A single form of prelien notice is sufficient for any commercial or residential property, with a few exceptions, such as oil and gas wells, mining property, and railroad rights-of-way.